<template>
  <div>
    <el-form ref="deptForm" label-width="120px" :rules="rules" :model="from">
      <el-form-item label="部门名称" prop="name">
        <el-input
          v-model="form.name"
          style="width: 80%"
          placeholder="1-50个字符"
        />
      </el-form-item>
      <el-form-item label="部门编码" prop="code">
        <el-input
          v-model="form.code"
          style="width: 80%"
          placeholder="1-50个字符"
        />
      </el-form-item>

      <el-form-item label="部门负责人" prop="manager">
        <el-select
          v-model="form.manager"
          style="width: 80%"
          placeholder="请选择"
        >
          <!-- <el-option value="1" :label="小美丽" />
            value: 选中之后保存在 form.manager 中的值
            label: 用户能看见选项内容
          -->
          <el-option
            v-for="employee in employees"
            :key="employee.id"
            :label="employee.username"
            :value="employee.username"
          />
        </el-select>
      </el-form-item>

      <el-form-item label="部门介绍" prop="introduce">
        <el-input
          v-model="form.introduce"
          style="width: 80%"
          placeholder="1-300个字符"
          type="textarea"
          :rows="3"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" size="small" @click="hSubmit">确定</el-button>
        <el-button size="small" @click="hCancel">取消</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import {
  addDepartments,
  getDepartDetail,
  updateDepartments
} from '@/api/departments'
import { getEmployeeSimple } from '@/api/employees'
// import { valid } from 'node_modules/mockjs/dist/mock'
export default {
  props: {
    originList: {
      type: Array,
      required: true
    },
    id: {
      type: String,
      required: true
    },
    isEdit: {
      type: Boolean,
      required: true
    }
  },
  data() {
    const validCode = (rule, value, callback) => {
      console.log('validCode....', value)
      // value就是当前用户输入的编码，它不能与现有的编码数据（originList）重复
      // 如果重复，就验证不通过
      // if(value能与现有的编码数据（originList）重复) {
      // 1. 从originList（[{id, pid,name, code},{id, pid,name, code}]）中找出全部的编码数据
      let existCodeList = this.originList.map(item => item.code)
      if (this.isEdit) {
        // 把当前正在编辑的部门编号（this.id）排除在外
        console.log('现在是编辑状态，正在编辑的id是', this.id)
        // 过滤掉当前的部门, map得到部门编号列表
        existCodeList = this.originList.filter(item => item.id !== this.id).map(item => item.code)
      }
      console.log('existCodeList', existCodeList)
      // 2. 检查value 是否存在其中

      // if (existCodeList.includes(value)) {
      //   callback(new Error('编码' + value + '已经存在'))
      // } else {
      //   callback()
      // }
      existCodeList.includes(value)
        ? callback(new Error('编码' + value + '已经存在'))
        : callback()
    }
    const validName = (rule, value, callback) => {
      // 思路：被占用的名字是这个部门的子部门
      let existNameList = this.originList.filter(item => item.pid === this.id).map(item => item.name)
      console.log('validName.... , 当前被校验的名字是', value)
      // const existNameList = ['财务核算部', '薪资核算部']
      // 如果是编辑，则被占用的名字 = 兄弟-自己
      if (this.isEdit) {
        // 1. 找到当前被编辑的元素
        const dept = this.originList.find(item => item.id === this.id)
        // 2. 取出pid(它的父级是谁)
        const pid = dept.pid
        // 3. 过滤： 同一个父级，不包括自己； map： 只要需要名字
        existNameList = this.originList.filter(item => item.pid === pid && item.id !== this.id).map(item => item.name)
      }
      console.log('被占用的名字列表', existNameList)

      if (existNameList.includes(value)) {
        callback(new Error('名字' + value + '已经被占用了'))
      } else {
        callback()
      }
    }

    return {
      // 定义规则
      rules: {
        name: [
          { required: true, message: '部门名称不能为空', trigger: 'blur' },
          {
            min: 1,
            max: 50,
            message: '部门名称要求1-50个字符',
            trigger: 'blur'
          },
          { validator: validName, trigger: 'blur' }
        ],
        code: [
          { required: true, message: '部门编码不能为空', trigger: 'blur' },
          {
            min: 1,
            max: 50,
            message: '部门编码要求1-50个字符',
            trigger: 'blur'
          },
          { validator: validCode, trigger: 'blur' }
        ],
        manager: [
          { required: true, message: '部门负责人不能为空', trigger: 'blur' }
        ],
        introduce: [
          { required: true, message: '部门介绍不能为空', trigger: 'blur' },
          {
            min: 1,
            max: 300,
            message: '部门介绍要求1-300个字符',
            trigger: 'blur'
          }
        ]
      },
      employees: [],
      form: {
        name: '', // 部门名称
        code: '', // 部门编码
        manager: '', // 部门管理者
        introduce: '' // 部门介绍
      }
    }
  },

  // watch: {
  //   id(newVal, oldVal) {
  //     console.log('id变化了', oldVal, '--->', newVal)
  //     this.loadDetail()
  //   }
  // },
  created() {
    this.loadEmployees()
    this.loadDetail()
  },
  methods: {
    // 获取当前部门的详情
    async loadDetail() {
      if (this.isEdit) {
        // alert('现在是编辑，要去获取详情')
        const res = await getDepartDetail(this.id)
        console.log('现在是编辑，要去获取详情', res)
        this.form = res.data
      }
    },
    async loadEmployees() {
      try {
        const res = await getEmployeeSimple()
        console.log('获取员工信息', res)
        this.employees = res.data
      } catch (err) {
        console.log(err)
      }
    },
    async doAdd() {
      // 组装参数. this.id是父组件传入的prop
      const res = await addDepartments({ ...this.form, pid: this.id })
      console.log(res)
      this.$emit('update-depart')
    },
    async doEdit() {
      try {
        await updateDepartments(this.form)
        this.$message({ type: 'success', message: '修改成功' })
        this.$emit('update-depart')
      } catch (err) {
        console.log(err)
        this.$message({ type: 'error', message: err })
      }
    },
    hSubmit() {
      // 先省略表单验证
      // 根据 isEdit的值，决定做保存还是添加
      // if (this.isEdit) {
      //   this.doEdit()
      // } else {
      //   this.doAdd()
      // }
      this.isEdit ? this.doEdit() : this.doAdd()
    },
    hCancel() {
      this.$refs.deptForm.resetFields() // 清空表单校验
      this.$emit('close')
    },
    // 手动兜底验证
    onSubmit() {
      this.$refs.from.validate((valid) => {
        if (valid) {
          this.isEdit ? this.doEdit() : this.doAdd()
        }
      })
    }
  }
}
</script>
